Meteoritical Bulletin: Entry for Northwest Africa 10887

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Northwest Africa 10887

Basic information

Name: Northwest Africa 10887
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10887
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 61.4 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	Eucrite-mmict
Recommended:			Eucrite-mmict [explanation]

This is 1 of 280 approved meteorites classified as Eucrite-mmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 14 Nov 2016

Writeup

help

Writeup from MB 105:

Northwest Africa 10887 (NWA 10887)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Gary Fujihara from Morocco, April 2016.

Physical characteristics: Single stone, partial fusion-crusted exterior. A saw cut surfaces reveal a fine-grained mix of white and gray plagioclase and pyroxene with mild brecciation. Scattered, black shock melt domains, up to 1 cm, are present throughout.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows an approximately 50-50 mix of plagioclase and pyroxene. The pyroxene grains show exsolution lamellae. Shock melt domains consist of fine grained quench crystals, with rafted clasts from the main lithology.

Geochemistry: (C. Agee and M. Spilde, UNM) Low-Ca pyroxene Fs_60.3±1.2Wo_3.4±1.5, Fe/Mn=31±1, n=6; augite Fs_28.1±2.2Wo_41.8±2.4, Fe/Mn=32±2, n=5; plagioclase An_88.9±0.6, n=5.

Classification: Eucrite (monomict), equilibrated, single lithology with compositional separation of low Ca-pyroxene and augite. Shock melt present.

Specimens: 12.28 g including a probe mount on deposit at UNM, Gary Fujihara holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Northwest Africa
Date:	P 2016
Mass (g):	61.38
Pieces:	1
Class:	Eucrite-mmict
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	60.3±1.2; 28.1±2.2
Wollastonite (mol%):	3.4±1.5; 41.8±2.4
Classifier:	C. Agee, UNM
Type spec mass (g):	12.28
Type spec location:	UNM
Main mass:	Gary Fujihara
Comments:	GF-8; submitted by C. Agee, UNM

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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